hsi: Build hsi_boardinfo.c into hsi core if enabled

If the HSI core is built as a module hsi_boardinfo may still
be built-in as its Kconfig type is bool, which can cause build
issues. Fix this by building this code into the HSI core when
enabled.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

1 files changed, 0 insertions, 781 deletions

diff --git a/drivers/hsi/hsi.c b/drivers/hsi/hsi.c
deleted file mode 100644
index d7ce07ad67f3..000000000000
--- a/drivers/hsi/hsi.c
+++ /dev/null
@@ -1,781 +0,0 @@
-/*
- * HSI core.
- *
- * Copyright (C) 2010 Nokia Corporation. All rights reserved.
- *
- * Contact: Carlos Chinea <carlos.chinea@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-#include <linux/hsi/hsi.h>
-#include <linux/compiler.h>
-#include <linux/list.h>
-#include <linux/kobject.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/notifier.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include "hsi_core.h"
-
-static ssize_t modalias_show(struct device *dev,
-			struct device_attribute *a __maybe_unused, char *buf)
-{
-	return sprintf(buf, "hsi:%s\n", dev_name(dev));
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *hsi_bus_dev_attrs[] = {
-	&dev_attr_modalias.attr,
-	NULL,
-};
-ATTRIBUTE_GROUPS(hsi_bus_dev);
-
-static int hsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
-	add_uevent_var(env, "MODALIAS=hsi:%s", dev_name(dev));
-
-	return 0;
-}
-
-static int hsi_bus_match(struct device *dev, struct device_driver *driver)
-{
-	if (of_driver_match_device(dev, driver))
-		return true;
-
-	if (strcmp(dev_name(dev), driver->name) == 0)
-		return true;
-
-	return false;
-}
-
-static struct bus_type hsi_bus_type = {
-	.name		= "hsi",
-	.dev_groups	= hsi_bus_dev_groups,
-	.match		= hsi_bus_match,
-	.uevent		= hsi_bus_uevent,
-};
-
-static void hsi_client_release(struct device *dev)
-{
-	struct hsi_client *cl = to_hsi_client(dev);
-
-	kfree(cl->tx_cfg.channels);
-	kfree(cl->rx_cfg.channels);
-	kfree(cl);
-}
-
-struct hsi_client *hsi_new_client(struct hsi_port *port,
-						struct hsi_board_info *info)
-{
-	struct hsi_client *cl;
-	size_t size;
-
-	cl = kzalloc(sizeof(*cl), GFP_KERNEL);
-	if (!cl)
-		goto err;
-
-	cl->tx_cfg = info->tx_cfg;
-	if (cl->tx_cfg.channels) {
-		size = cl->tx_cfg.num_channels * sizeof(*cl->tx_cfg.channels);
-		cl->tx_cfg.channels = kmemdup(info->tx_cfg.channels, size,
-					      GFP_KERNEL);
-		if (!cl->tx_cfg.channels)
-			goto err_tx;
-	}
-
-	cl->rx_cfg = info->rx_cfg;
-	if (cl->rx_cfg.channels) {
-		size = cl->rx_cfg.num_channels * sizeof(*cl->rx_cfg.channels);
-		cl->rx_cfg.channels = kmemdup(info->rx_cfg.channels, size,
-					      GFP_KERNEL);
-		if (!cl->rx_cfg.channels)
-			goto err_rx;
-	}
-
-	cl->device.bus = &hsi_bus_type;
-	cl->device.parent = &port->device;
-	cl->device.release = hsi_client_release;
-	dev_set_name(&cl->device, "%s", info->name);
-	cl->device.platform_data = info->platform_data;
-	if (info->archdata)
-		cl->device.archdata = *info->archdata;
-	if (device_register(&cl->device) < 0) {
-		pr_err("hsi: failed to register client: %s\n", info->name);
-		put_device(&cl->device);
-	}
-
-	return cl;
-err_rx:
-	kfree(cl->tx_cfg.channels);
-err_tx:
-	kfree(cl);
-err:
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(hsi_new_client);
-
-static void hsi_scan_board_info(struct hsi_controller *hsi)
-{
-	struct hsi_cl_info *cl_info;
-	struct hsi_port	*p;
-
-	list_for_each_entry(cl_info, &hsi_board_list, list)
-		if (cl_info->info.hsi_id == hsi->id) {
-			p = hsi_find_port_num(hsi, cl_info->info.port);
-			if (!p)
-				continue;
-			hsi_new_client(p, &cl_info->info);
-		}
-}
-
-#ifdef CONFIG_OF
-static struct hsi_board_info hsi_char_dev_info = {
-	.name = "hsi_char",
-};
-
-static int hsi_of_property_parse_mode(struct device_node *client, char *name,
-				      unsigned int *result)
-{
-	const char *mode;
-	int err;
-
-	err = of_property_read_string(client, name, &mode);
-	if (err < 0)
-		return err;
-
-	if (strcmp(mode, "stream") == 0)
-		*result = HSI_MODE_STREAM;
-	else if (strcmp(mode, "frame") == 0)
-		*result = HSI_MODE_FRAME;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-
-static int hsi_of_property_parse_flow(struct device_node *client, char *name,
-				      unsigned int *result)
-{
-	const char *flow;
-	int err;
-
-	err = of_property_read_string(client, name, &flow);
-	if (err < 0)
-		return err;
-
-	if (strcmp(flow, "synchronized") == 0)
-		*result = HSI_FLOW_SYNC;
-	else if (strcmp(flow, "pipeline") == 0)
-		*result = HSI_FLOW_PIPE;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-
-static int hsi_of_property_parse_arb_mode(struct device_node *client,
-					  char *name, unsigned int *result)
-{
-	const char *arb_mode;
-	int err;
-
-	err = of_property_read_string(client, name, &arb_mode);
-	if (err < 0)
-		return err;
-
-	if (strcmp(arb_mode, "round-robin") == 0)
-		*result = HSI_ARB_RR;
-	else if (strcmp(arb_mode, "priority") == 0)
-		*result = HSI_ARB_PRIO;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-
-static void hsi_add_client_from_dt(struct hsi_port *port,
-						struct device_node *client)
-{
-	struct hsi_client *cl;
-	struct hsi_channel channel;
-	struct property *prop;
-	char name[32];
-	int length, cells, err, i, max_chan, mode;
-
-	cl = kzalloc(sizeof(*cl), GFP_KERNEL);
-	if (!cl)
-		return;
-
-	err = of_modalias_node(client, name, sizeof(name));
-	if (err)
-		goto err;
-
-	dev_set_name(&cl->device, "%s", name);
-
-	err = hsi_of_property_parse_mode(client, "hsi-mode", &mode);
-	if (err) {
-		err = hsi_of_property_parse_mode(client, "hsi-rx-mode",
-						 &cl->rx_cfg.mode);
-		if (err)
-			goto err;
-
-		err = hsi_of_property_parse_mode(client, "hsi-tx-mode",
-						 &cl->tx_cfg.mode);
-		if (err)
-			goto err;
-	} else {
-		cl->rx_cfg.mode = mode;
-		cl->tx_cfg.mode = mode;
-	}
-
-	err = of_property_read_u32(client, "hsi-speed-kbps",
-				   &cl->tx_cfg.speed);
-	if (err)
-		goto err;
-	cl->rx_cfg.speed = cl->tx_cfg.speed;
-
-	err = hsi_of_property_parse_flow(client, "hsi-flow",
-					 &cl->rx_cfg.flow);
-	if (err)
-		goto err;
-
-	err = hsi_of_property_parse_arb_mode(client, "hsi-arb-mode",
-					     &cl->rx_cfg.arb_mode);
-	if (err)
-		goto err;
-
-	prop = of_find_property(client, "hsi-channel-ids", &length);
-	if (!prop) {
-		err = -EINVAL;
-		goto err;
-	}
-
-	cells = length / sizeof(u32);
-
-	cl->rx_cfg.num_channels = cells;
-	cl->tx_cfg.num_channels = cells;
-
-	cl->rx_cfg.channels = kzalloc(cells * sizeof(channel), GFP_KERNEL);
-	if (!cl->rx_cfg.channels) {
-		err = -ENOMEM;
-		goto err;
-	}
-
-	cl->tx_cfg.channels = kzalloc(cells * sizeof(channel), GFP_KERNEL);
-	if (!cl->tx_cfg.channels) {
-		err = -ENOMEM;
-		goto err2;
-	}
-
-	max_chan = 0;
-	for (i = 0; i < cells; i++) {
-		err = of_property_read_u32_index(client, "hsi-channel-ids", i,
-						 &channel.id);
-		if (err)
-			goto err3;
-
-		err = of_property_read_string_index(client, "hsi-channel-names",
-						    i, &channel.name);
-		if (err)
-			channel.name = NULL;
-
-		if (channel.id > max_chan)
-			max_chan = channel.id;
-
-		cl->rx_cfg.channels[i] = channel;
-		cl->tx_cfg.channels[i] = channel;
-	}
-
-	cl->rx_cfg.num_hw_channels = max_chan + 1;
-	cl->tx_cfg.num_hw_channels = max_chan + 1;
-
-	cl->device.bus = &hsi_bus_type;
-	cl->device.parent = &port->device;
-	cl->device.release = hsi_client_release;
-	cl->device.of_node = client;
-
-	if (device_register(&cl->device) < 0) {
-		pr_err("hsi: failed to register client: %s\n", name);
-		put_device(&cl->device);
-	}
-
-	return;
-
-err3:
-	kfree(cl->tx_cfg.channels);
-err2:
-	kfree(cl->rx_cfg.channels);
-err:
-	kfree(cl);
-	pr_err("hsi client: missing or incorrect of property: err=%d\n", err);
-}
-
-void hsi_add_clients_from_dt(struct hsi_port *port, struct device_node *clients)
-{
-	struct device_node *child;
-
-	/* register hsi-char device */
-	hsi_new_client(port, &hsi_char_dev_info);
-
-	for_each_available_child_of_node(clients, child)
-		hsi_add_client_from_dt(port, child);
-}
-EXPORT_SYMBOL_GPL(hsi_add_clients_from_dt);
-#endif
-
-int hsi_remove_client(struct device *dev, void *data __maybe_unused)
-{
-	device_unregister(dev);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(hsi_remove_client);
-
-static int hsi_remove_port(struct device *dev, void *data __maybe_unused)
-{
-	device_for_each_child(dev, NULL, hsi_remove_client);
-	device_unregister(dev);
-
-	return 0;
-}
-
-static void hsi_controller_release(struct device *dev)
-{
-	struct hsi_controller *hsi = to_hsi_controller(dev);
-
-	kfree(hsi->port);
-	kfree(hsi);
-}
-
-static void hsi_port_release(struct device *dev)
-{
-	kfree(to_hsi_port(dev));
-}
-
-/**
- * hsi_unregister_port - Unregister an HSI port
- * @port: The HSI port to unregister
- */
-void hsi_port_unregister_clients(struct hsi_port *port)
-{
-	device_for_each_child(&port->device, NULL, hsi_remove_client);
-}
-EXPORT_SYMBOL_GPL(hsi_port_unregister_clients);
-
-/**
- * hsi_unregister_controller - Unregister an HSI controller
- * @hsi: The HSI controller to register
- */
-void hsi_unregister_controller(struct hsi_controller *hsi)
-{
-	device_for_each_child(&hsi->device, NULL, hsi_remove_port);
-	device_unregister(&hsi->device);
-}
-EXPORT_SYMBOL_GPL(hsi_unregister_controller);
-
-/**
- * hsi_register_controller - Register an HSI controller and its ports
- * @hsi: The HSI controller to register
- *
- * Returns -errno on failure, 0 on success.
- */
-int hsi_register_controller(struct hsi_controller *hsi)
-{
-	unsigned int i;
-	int err;
-
-	err = device_add(&hsi->device);
-	if (err < 0)
-		return err;
-	for (i = 0; i < hsi->num_ports; i++) {
-		hsi->port[i]->device.parent = &hsi->device;
-		err = device_add(&hsi->port[i]->device);
-		if (err < 0)
-			goto out;
-	}
-	/* Populate HSI bus with HSI clients */
-	hsi_scan_board_info(hsi);
-
-	return 0;
-out:
-	while (i-- > 0)
-		device_del(&hsi->port[i]->device);
-	device_del(&hsi->device);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(hsi_register_controller);
-
-/**
- * hsi_register_client_driver - Register an HSI client to the HSI bus
- * @drv: HSI client driver to register
- *
- * Returns -errno on failure, 0 on success.
- */
-int hsi_register_client_driver(struct hsi_client_driver *drv)
-{
-	drv->driver.bus = &hsi_bus_type;
-
-	return driver_register(&drv->driver);
-}
-EXPORT_SYMBOL_GPL(hsi_register_client_driver);
-
-static inline int hsi_dummy_msg(struct hsi_msg *msg __maybe_unused)
-{
-	return 0;
-}
-
-static inline int hsi_dummy_cl(struct hsi_client *cl __maybe_unused)
-{
-	return 0;
-}
-
-/**
- * hsi_put_controller - Free an HSI controller
- *
- * @hsi: Pointer to the HSI controller to freed
- *
- * HSI controller drivers should only use this function if they need
- * to free their allocated hsi_controller structures before a successful
- * call to hsi_register_controller. Other use is not allowed.
- */
-void hsi_put_controller(struct hsi_controller *hsi)
-{
-	unsigned int i;
-
-	if (!hsi)
-		return;
-
-	for (i = 0; i < hsi->num_ports; i++)
-		if (hsi->port && hsi->port[i])
-			put_device(&hsi->port[i]->device);
-	put_device(&hsi->device);
-}
-EXPORT_SYMBOL_GPL(hsi_put_controller);
-
-/**
- * hsi_alloc_controller - Allocate an HSI controller and its ports
- * @n_ports: Number of ports on the HSI controller
- * @flags: Kernel allocation flags
- *
- * Return NULL on failure or a pointer to an hsi_controller on success.
- */
-struct hsi_controller *hsi_alloc_controller(unsigned int n_ports, gfp_t flags)
-{
-	struct hsi_controller	*hsi;
-	struct hsi_port		**port;
-	unsigned int		i;
-
-	if (!n_ports)
-		return NULL;
-
-	hsi = kzalloc(sizeof(*hsi), flags);
-	if (!hsi)
-		return NULL;
-	port = kzalloc(sizeof(*port)*n_ports, flags);
-	if (!port) {
-		kfree(hsi);
-		return NULL;
-	}
-	hsi->num_ports = n_ports;
-	hsi->port = port;
-	hsi->device.release = hsi_controller_release;
-	device_initialize(&hsi->device);
-
-	for (i = 0; i < n_ports; i++) {
-		port[i] = kzalloc(sizeof(**port), flags);
-		if (port[i] == NULL)
-			goto out;
-		port[i]->num = i;
-		port[i]->async = hsi_dummy_msg;
-		port[i]->setup = hsi_dummy_cl;
-		port[i]->flush = hsi_dummy_cl;
-		port[i]->start_tx = hsi_dummy_cl;
-		port[i]->stop_tx = hsi_dummy_cl;
-		port[i]->release = hsi_dummy_cl;
-		mutex_init(&port[i]->lock);
-		ATOMIC_INIT_NOTIFIER_HEAD(&port[i]->n_head);
-		dev_set_name(&port[i]->device, "port%d", i);
-		hsi->port[i]->device.release = hsi_port_release;
-		device_initialize(&hsi->port[i]->device);
-	}
-
-	return hsi;
-out:
-	hsi_put_controller(hsi);
-
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(hsi_alloc_controller);
-
-/**
- * hsi_free_msg - Free an HSI message
- * @msg: Pointer to the HSI message
- *
- * Client is responsible to free the buffers pointed by the scatterlists.
- */
-void hsi_free_msg(struct hsi_msg *msg)
-{
-	if (!msg)
-		return;
-	sg_free_table(&msg->sgt);
-	kfree(msg);
-}
-EXPORT_SYMBOL_GPL(hsi_free_msg);
-
-/**
- * hsi_alloc_msg - Allocate an HSI message
- * @nents: Number of memory entries
- * @flags: Kernel allocation flags
- *
- * nents can be 0. This mainly makes sense for read transfer.
- * In that case, HSI drivers will call the complete callback when
- * there is data to be read without consuming it.
- *
- * Return NULL on failure or a pointer to an hsi_msg on success.
- */
-struct hsi_msg *hsi_alloc_msg(unsigned int nents, gfp_t flags)
-{
-	struct hsi_msg *msg;
-	int err;
-
-	msg = kzalloc(sizeof(*msg), flags);
-	if (!msg)
-		return NULL;
-
-	if (!nents)
-		return msg;
-
-	err = sg_alloc_table(&msg->sgt, nents, flags);
-	if (unlikely(err)) {
-		kfree(msg);
-		msg = NULL;
-	}
-
-	return msg;
-}
-EXPORT_SYMBOL_GPL(hsi_alloc_msg);
-
-/**
- * hsi_async - Submit an HSI transfer to the controller
- * @cl: HSI client sending the transfer
- * @msg: The HSI transfer passed to controller
- *
- * The HSI message must have the channel, ttype, complete and destructor
- * fields set beforehand. If nents > 0 then the client has to initialize
- * also the scatterlists to point to the buffers to write to or read from.
- *
- * HSI controllers relay on pre-allocated buffers from their clients and they
- * do not allocate buffers on their own.
- *
- * Once the HSI message transfer finishes, the HSI controller calls the
- * complete callback with the status and actual_len fields of the HSI message
- * updated. The complete callback can be called before returning from
- * hsi_async.
- *
- * Returns -errno on failure or 0 on success
- */
-int hsi_async(struct hsi_client *cl, struct hsi_msg *msg)
-{
-	struct hsi_port *port = hsi_get_port(cl);
-
-	if (!hsi_port_claimed(cl))
-		return -EACCES;
-
-	WARN_ON_ONCE(!msg->destructor || !msg->complete);
-	msg->cl = cl;
-
-	return port->async(msg);
-}
-EXPORT_SYMBOL_GPL(hsi_async);
-
-/**
- * hsi_claim_port - Claim the HSI client's port
- * @cl: HSI client that wants to claim its port
- * @share: Flag to indicate if the client wants to share the port or not.
- *
- * Returns -errno on failure, 0 on success.
- */
-int hsi_claim_port(struct hsi_client *cl, unsigned int share)
-{
-	struct hsi_port *port = hsi_get_port(cl);
-	int err = 0;
-
-	mutex_lock(&port->lock);
-	if ((port->claimed) && (!port->shared || !share)) {
-		err = -EBUSY;
-		goto out;
-	}
-	if (!try_module_get(to_hsi_controller(port->device.parent)->owner)) {
-		err = -ENODEV;
-		goto out;
-	}
-	port->claimed++;
-	port->shared = !!share;
-	cl->pclaimed = 1;
-out:
-	mutex_unlock(&port->lock);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(hsi_claim_port);
-
-/**
- * hsi_release_port - Release the HSI client's port
- * @cl: HSI client which previously claimed its port
- */
-void hsi_release_port(struct hsi_client *cl)
-{
-	struct hsi_port *port = hsi_get_port(cl);
-
-	mutex_lock(&port->lock);
-	/* Allow HW driver to do some cleanup */
-	port->release(cl);
-	if (cl->pclaimed)
-		port->claimed--;
-	BUG_ON(port->claimed < 0);
-	cl->pclaimed = 0;
-	if (!port->claimed)
-		port->shared = 0;
-	module_put(to_hsi_controller(port->device.parent)->owner);
-	mutex_unlock(&port->lock);
-}
-EXPORT_SYMBOL_GPL(hsi_release_port);
-
-static int hsi_event_notifier_call(struct notifier_block *nb,
-				unsigned long event, void *data __maybe_unused)
-{
-	struct hsi_client *cl = container_of(nb, struct hsi_client, nb);
-
-	(*cl->ehandler)(cl, event);
-
-	return 0;
-}
-
-/**
- * hsi_register_port_event - Register a client to receive port events
- * @cl: HSI client that wants to receive port events
- * @handler: Event handler callback
- *
- * Clients should register a callback to be able to receive
- * events from the ports. Registration should happen after
- * claiming the port.
- * The handler can be called in interrupt context.
- *
- * Returns -errno on error, or 0 on success.
- */
-int hsi_register_port_event(struct hsi_client *cl,
-			void (*handler)(struct hsi_client *, unsigned long))
-{
-	struct hsi_port *port = hsi_get_port(cl);
-
-	if (!handler || cl->ehandler)
-		return -EINVAL;
-	if (!hsi_port_claimed(cl))
-		return -EACCES;
-	cl->ehandler = handler;
-	cl->nb.notifier_call = hsi_event_notifier_call;
-
-	return atomic_notifier_chain_register(&port->n_head, &cl->nb);
-}
-EXPORT_SYMBOL_GPL(hsi_register_port_event);
-
-/**
- * hsi_unregister_port_event - Stop receiving port events for a client
- * @cl: HSI client that wants to stop receiving port events
- *
- * Clients should call this function before releasing their associated
- * port.
- *
- * Returns -errno on error, or 0 on success.
- */
-int hsi_unregister_port_event(struct hsi_client *cl)
-{
-	struct hsi_port *port = hsi_get_port(cl);
-	int err;
-
-	WARN_ON(!hsi_port_claimed(cl));
-
-	err = atomic_notifier_chain_unregister(&port->n_head, &cl->nb);
-	if (!err)
-		cl->ehandler = NULL;
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(hsi_unregister_port_event);
-
-/**
- * hsi_event - Notifies clients about port events
- * @port: Port where the event occurred
- * @event: The event type
- *
- * Clients should not be concerned about wake line behavior. However, due
- * to a race condition in HSI HW protocol, clients need to be notified
- * about wake line changes, so they can implement a workaround for it.
- *
- * Events:
- * HSI_EVENT_START_RX - Incoming wake line high
- * HSI_EVENT_STOP_RX - Incoming wake line down
- *
- * Returns -errno on error, or 0 on success.
- */
-int hsi_event(struct hsi_port *port, unsigned long event)
-{
-	return atomic_notifier_call_chain(&port->n_head, event, NULL);
-}
-EXPORT_SYMBOL_GPL(hsi_event);
-
-/**
- * hsi_get_channel_id_by_name - acquire channel id by channel name
- * @cl: HSI client, which uses the channel
- * @name: name the channel is known under
- *
- * Clients can call this function to get the hsi channel ids similar to
- * requesting IRQs or GPIOs by name. This function assumes the same
- * channel configuration is used for RX and TX.
- *
- * Returns -errno on error or channel id on success.
- */
-int hsi_get_channel_id_by_name(struct hsi_client *cl, char *name)
-{
-	int i;
-
-	if (!cl->rx_cfg.channels)
-		return -ENOENT;
-
-	for (i = 0; i < cl->rx_cfg.num_channels; i++)
-		if (!strcmp(cl->rx_cfg.channels[i].name, name))
-			return cl->rx_cfg.channels[i].id;
-
-	return -ENXIO;
-}
-EXPORT_SYMBOL_GPL(hsi_get_channel_id_by_name);
-
-static int __init hsi_init(void)
-{
-	return bus_register(&hsi_bus_type);
-}
-postcore_initcall(hsi_init);
-
-static void __exit hsi_exit(void)
-{
-	bus_unregister(&hsi_bus_type);
-}
-module_exit(hsi_exit);
-
-MODULE_AUTHOR("Carlos Chinea <carlos.chinea@nokia.com>");
-MODULE_DESCRIPTION("High-speed Synchronous Serial Interface (HSI) framework");
-MODULE_LICENSE("GPL v2");